CATALOGUE. 345 Webeea acuminata, Brch. & Sch.—Densely csespitose, monoicous; stem simple; lower leaves ovate-lanceolate, erect; upper fastigiate, crowded, twice as large, linear-lanceolate, margin revolute, serrate at the apex; nerve strong, cxcurrcnt; areolation lax; interior perichsete not revolute, entire; capsule on a shortish pedicel, cylindrical, long pyriform, long neck nodding; operculum conic-acuminate. Hab.—Twin Lakes, in crevices of rocks in the shade; rare. Webeea elongata, (Dicks.) Schwseg., var. alpinum, B. & S. Hab.—Twin Lakes, in like situations. Webeea elongata, var. minus, B. & S. Hab.—Mount Graham sand-hills, Arizona. Webeea nutans, Schreb. Hab.—Twin Lakes, on shaded ground. Webeea nutans, var. /?. casspiTOSA, B. & S. Hab.—Twin Lakes, in bogs. Webeea nutans, var. y. bicolob, B. & S. Hab.—Twin Lakes, at the base of trees in open woods. Webeea nutans, var. e. longiseta, B. & S. Hab.—Twin Lakes, in same localities. Beyum uliginosum, Brch. & Sch.—In this plant, the flowers are her¬ maphrodite, a rare occurrence with this species. Hab.—Twin Lakes, in wet positions. Beyum pendulum, (Hornsch.) Schp. Hab.—Twin Lakes, on low ground. Beyum pendulum, var.—The male gemma on separate branches. Hab.—Twin Lakes, in similar places. Beyum inteemedium, Web. & Mohr. Hab.—Twin Lakes, on moist rocks, and at Santa Fi, in New Mexico,in like situations. Beyum cieehatum, Hopp. & Hornsch. Hab.—South Park, on low ground, Beyum pallescens, Schleich. Hob.—South Park, on damp ground. Beyum pallescens, var. y. contextum.